Electronic telephone system



April 8, 1958 R. B. TROUSDALE 2,330,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4,.1955 47 Sheets-Sheet 1 STA.

NOTE SCONNECTED ON PARTY LINES ONLY E INVENTOR. F ROBERT B.TROUSDALE BY q I AGENT April 8, 1958 R. B. TROUSDALE Filed March 4, 1955 47 Sheets-Sheet I2 LINKA Jk M2 MULTIPLE TONES OUT POINT FIG. l4

RELEASE RP PULSE AMPLIFIER FIGJB RELEASE PULSE GENERATOR FIG. l7

5c SWITCH CONTROL FIG. 9

Bll LINK I MULTIPLE POINT RELEASE RP PULSE AMPLIFIER RELEASE PULSE GENERATOR SWITCH CONTROL LINE FINDER FIGS. l9 G20 April 8, 1958 R. B. TROUSDALE 2,830,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1255 47 Sheets-Sheet I5 ASI-A LINK ALLOTTER CIRCUIT DIAL TONE TONE FIG. l2

CONNECTOR FIGS. 33-4l INCL AUXILIARY PULSE AMPLIFIER F|G.9

LB ABP UNITS BUSY LEAD CONVERTER a EMERGENCY SERVICE NUMBER FIGS. IO 8 II TENS TONE

TONE

CONNECTOR NEG. TENS NEG. UNITS CBI 2 CONNECTOR BUSY AMPLIFIER FIGJB FINDER BUSY I AMPLIFIER FIG. IO

April s', 1958 Filed March 4, 1955 R. B.-TRousDALI-:

ELECTRONIC TELEPHONE SYSTEM 47 Sheets-Sheet 5 LINK C /I3C cu LINK MULTIPLE 4 TONES OUT 02 POINT I4C RP I I5C- Rs RELEASE RELEAsE As LINE FR'A i PULSE 1 PULSE FINDER :w -c

AMPLIFIER GENERATOR E I II+VMII "PX SWTCH /l6c LB Pos.uNI1's sc 1 sm POS.TEN$

CONTROL 3 LG RoP ASI-C AL-C /25 e; I MULTIPLEXER MPX MPLPIER RINGING coNTRoL RC DRIVER RC0 FIG. l4

NEG. IP05. NEG. M TENS TENS UNITS {Posmm'rs II II RDP NTI PT|?1 F1 NUI|2|3H PUll2|3H SP REGISTER TENS RING UNITS RING sAMPLING DRIVE AMPLIFIER AMPLIFIER PuLsE E CIRCUITS cIRcuITs AMPLIF ER 35/ FIG.24 FIG.23 F|G.22 29 J I SP0 I 33 HI I H-H HH I fii" s4- a2 30 DT gg fi TENS ING UNITS RING QF Q INPUT PULSE RED CIRCUIT TED cIRcu T GENERATOR /.4a

UNETRSIVFE-ZING FIGS. I 24 830 FIG. 23 FIG.22 m1 FIG.5

April s, 1958 Filed March 4, 1955 CON NECTOR TRUNK HUNTING BI EXECUTIVE CUT IN MARKERS FIG.25

MASTER OSCILLATOR FIG. 2|

R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM EXECUTIVE CUT IN AMPLIFIER FIG. 26

TRUNK HUNTING AMPLIFIER FIG.26

47 Sheets-Sheet 6 FIG.6

Aprils, 1958 R. B. TROUSDALE 2,830,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 7 April 8, 1958 R. B. TROUSDALE 2,330,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 8 AUXILIARY PUL SE AMPLIFIER 2O FIG.9'

A ril 8, 1958 R. B. TROUSDALE 2,830,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 9 BUSY LEAD CONVERTER 4 EMERGENCY SERVICE NUMBER CIRCUIT 2| ABP REG

"'" IOSI I062 CDIOOT LB ,1 FBI I LBR I FIG. IO

April 8, 1958 R. B. TROUSDALE 2,830,123

ELECTRONIC TELEPHONE sYsTEM Filed March 4, 1955 I 47 Sheets-Sheet 10 BUSY LEAD CONVERTER 8; EMERGENCY SERVICE NUMBER CIRCUIT 2| couou [\L HOl 2 TA M QUARTER couoz l DECK STATION LINE CIRCUIT "-\/\N@ 0 03% STA EMERGENCY T I c I 225 SERVICE R 0H3 PILOT HOUSE LINE CIRCUIT s 6 STATION STATION NO. LINE CIRCUIT n05; SWITCH POSITION pus IPU 8 TER DECK PTZ PTO 2. UAR

3.P|LOT HOUSE I TENS A POS.UNIT$ EMERGENCY SERVICE NUMBER RDP SWITCH IIOO ABP MPX Ta ARTIFICIAL v :3; FB

BUSY SWITCHES CDHO dPU3 conoa o-PU5 0PU6 o-PU7 A21 PU? 0\ PUB POS. UNITS L PU9 a lLpuo p113 UNITS SELECTOR [mo c|)uo'r CB! 1 POS.TENS

AL-A L l TENS 2 SELECTOR April 8, 1958 R. B. TROUSDALE 2,830,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet ll LINK ALLOTTERCIRCUIT l9 TO IZIOC LINE A FINDER ITC FIG. l2

April 8, 1958 R. B. TRbusDALE 2,830,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet l2 Ll N E C l RC U 11' I I R|303 c T uam ml Ha & H03, & H02,

llbl O TO DIODE I344 llb3 SWITCH CIRCUIT IIB |lb2 llcl wx I345 TO DIODE *\/I msoz v llc3 SWITCH vlaol/ c2 CIRCUITIIC |346 SLEEVE I MM n RINGING RING CONTROL I300 R1309 OSCILLATOR RINGING "7 I320 CONTROL GATE |352 I302 I m LCPH N cmaos CD J RRP RTP April 8, 1958 R. B. TROUSDALE 2,830,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 13 DIODE LINK SWITCH CHiCUIT HA MULTIPLE omT |3A I RH a w ICI4O| 72 T cm4o2 I\L in NOTE! OUTPUTS OF ALL I00 H DIODE SWITCH CIRCUITS IN LINK'A" SDVII(ID1PCEH COMO: CONNECT TO THESE TERMINALS CONTROL L R I408 R1407 RCO April 8, 1958 R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 14 SP! sc CHANNEL PULSE MATRIX 26 NTI colsogZ CD502 CPH cm CPIO 1 um: F

CIRCUIT R|5o| use. TENS NTZ T CPZI To cpzz CF20 LINE cm r un *DH I J I x k K L NTO CPOI cpoa CPO-O TNUI Ruz TNUO NEG. UNITS Mll TONES OUT Rp -NEG.

' PO5.UN|TS- um'rs April 1958 R. B. TROLISDALE 2,830,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 15 SPI I LG NEG.TENS

NEG. UNITS MULTIPLEXER 24 CD I603 SP I RIEOZ CIGOI CD|605 c soz CDISOS NTI I R| 603 Ill " 1 FIG. l6

TONES OU'T P08. UNITS NEG.TENS

SP RP Filed March 4, 1955 April 8, 1958 R. B. TROUSDALE 2,830,123

ELECTRONIC TELEPHONE SYSTEM 47 Sheets-Sheet l6 LG NEG.TENS NEG.UNITS MULTIPLEXER OUTPUl AMPLIFIER 25 Tl7l0 NIF'X AMPLIFIER I700 CD|7OI r-I RELEASE PULSE GENERATOR I5A v M fi ASTABLE OSCILLATOR AS I732 cIvoI:

FIG. IT

TONES OUT POS.UN|TS RP PD$.UN|TS POS.TENS

A ril s, 1958 Filed March 4;, 1955 'POSJENS R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM 47 Sheets-Sheet 17 FIG. l8

MPX

CONNECTOR BUgY AMPLIFIER 22 new RELEASE PU LSE AM PLIFI ER l4A April 1958 R. B. TROUSDALE 2,830,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 18 LINE FIND ER ITA REGISTER UNITS DRIVE REGISTER PULSE PULSER mos UNITS REGISTER cmeos c|9o2 f' 'lg' ragg RI9|| J clsos c|9|o I907 cmsoa POS.UNITS$ i [/1 N cmsos CDISIO POS.TENS

ALLOTTER R1907 I la START As I95OA ALLOTTER LG START. I950B' ASl-A i NFs-- RS- FCT April 1958 R. B. TROUSDALE I 2,830,123

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet l9 TENS LINE FINDER 17A REGISTER PULSER RZOOI I TENS REGISTER c2001 c2002 ll TENSI TENS 2 v 002002 N R2009 I. W P0$.TENS PT2 c02003 PTO 7 FINDER (:H L PULSE GATE FOLLOWER NFG FCT

FIG. 20

April s, 1958 Filed March 4, 1955 R. B. TROUSDALE' ELECTRONIC TELEPHONE SYSTEM MASTER os clLLqoR 28 47 Sheets-Sheet 20 UNITS RING RRIVE 43 RTP SAMPLING PULSF GENERATOR 44 CLIPPER SPD 

